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Discussion Starter · #1 ·
Ok so for those of your who read my Thanksgiving thread about all the stuff that I broke, you would know I have a nasty clunk in my 840 Teryx Motor.

For all you motor guys/gals, if valves are out of adjustment would they make a nasty clunk or am I correct in assuming it is something deeper in the motor? Could the crack shaft be slapping? Bad bearing?

The odd thing is that the motor ran great just prior and then whoops I can out of gas. I get it started back up and there is that clunk. Any insight?

Thanks!



 

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Premium Member
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683 Posts
Clunks can be a mutitude of things from a rod knock to a timing chain. Does its frequency increase with RPM? Can you do a sound clip of it. Also try and isolate were in the motor it is with the mike.



 

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Ok so for those of your who read my Thanksgiving thread about all the stuff that I broke, you would know I have a nasty clunk in my 840 Teryx Motor.

For all you motor guys/gals, if valves are out of adjustment would they make a nasty clunk or am I correct in assuming it is something deeper in the motor? Could the crack shaft be slapping? Bad bearing?

The odd thing is that the motor ran great just prior and then whoops I can out of gas. I get it started back up and there is that clunk. Any insight?

Thanks!
When you say clunk, I am thinking of a single noise like when you put it in gear. Knocking makes more sense.
 

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Discussion Starter · #4 ·
Actually that is a good point...a clunk does imply a single noise. This is a knock which gets faster as the RPMs increase. Does not appear to be the knock that you would get from a stretched belt, but more a knock down in the motor. As Odynuck indicated it may take the use of a scope to determine where it is coming from...just seems odd that it happened all of a sudden.

I will see if I can get a sound clip of it this weekend. It sounds like it is lower on the motor, however, that can be deceiving since sounds can resonate.



 

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We have had a couple of customers that have had the bottom end and the top end crap out on them! One customer is on round four with the warranty company! Not so sure about the Teryx's anymore!
 

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Discussion Starter · #9 ·
Sounds like I am going to have to take it in and have the motor torn apart...ugh. Might as well change out the belt while I am at it.



 

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Anything else that you can think?...the ""running fine-running out of gas-now have an engine noise"" is key to this I think....too much to be a coincidence IMO....would love to hear it.....easy to mis-diagnose without being there....

have you used a screwdriver / metal rod to isolate the noise yet?.....

taken the CVT belt off to listen to just the engine?.....

Have some engine guru buds by you to listen to it?.....Lance
 

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The Outlaw Ignore Amos
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Sounds like a good excuse to get a Commander???

"Sorry Honey, it was going to cost more to fix it than just replace it with a
new Commander"
 

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Discussion Starter · #12 ·
Now we are talking Michael! I do really want a Commander, maybe I can find someone who has a new one and is willing to trade for my Teryx with the few mods it has :)



 

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Discussion Starter · #14 ·
Lance is right never give up to soon
Oh not giving up, just might be out of my realm of experitise...I really hate to run it too much since I do not know what is wrong and would hate to damage the internals any more.



 
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